3 ms·

> jump down one 7-semitone step and up 5 A (440 Hz), down to D. A, up to E, up to B, up to F#, up to C#, up to G#. Sort: A B C# D E F# G#. This is the A major

• blockchaincloud 8y ago
  If I can wear out my welcome, I can see the construction from D onwards - jumps of 7, but how did you get to D? The instruction was 7)semi tones down, which from A is D "in previous scale"), but what about the 5 semi tones up? One new question that popped in my mind- is this series of instructions (7down, 5up) a reverse engineering of the A major sequence to fit the 7- jump rule or is there some theory about it? I have no clue what different scales even mean or what major and minor means. Feel free to ignore the new questions (or the old one!)
  • sampo 8y ago
    The blog means two different sequences of jumps. The sequence of down-jumps begins from A. Then the sequence of up-jumps begins from A. {jumps down: 1, jumps up: 5} First, you start from A, and execute the down-jumps. In this case, there is only one. Then you start again from A (returning to A is not counted as a jump), and execute the up-jumps. > Up two 7-semitone steps and down four gives you A minor. Up-jump sequence: A, up to E, up to B. Down-jump sequence: A, down to D, down to G, down to C, down to F. Sort: A B C D E F G I don't know what's behind this idea, or how useful it is. It seems to work, though. But I think there are simpler ways to construct the scales. Or just memorize them.